Perhaps you should try some spelling variations:
national research » educational research
medicine research » medical research, media research, vaccine research
multi national » multinationals _
new medicine » one medicine, novel medicine, tele medicine
july 2007 » july 2008, july 2013, july 2012

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( multi national research : july 2007 ) or ( new medicine research : july 2007 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( multi national research : july 2007 ) OR ( new medicine research : july 2007 )).
• Adding a wildcard symbol may retrieve word variants: (( multi national research : july 2007 ) or ( new medicine research : july 2007 ))*.